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9. What to do with unused pins on an Atmega328P or Attiny85? - Tech Explorations
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Arduino Uno R3 ATMEGA16U2 Board with usb cable - UMT Media
Dfrduino Uno R3 Microcontroller Dev Board Atmega328 Atmega16u2 Chip 16mhz Fully Compatible With Arduino Uno R3 And Arduino Ide - Demo Board - AliExpress
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Ultimate Arduino Mega 2560 Hardware Manual (Extract) by Elektor - Issuu
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